One Word Substitution

A misanthrope is a person who dislikes humankind and avoids human society. A philanthropist is the opposite, someone who loves humanity.

An autobiography is an account of a person's life written by that person. A biography is written by someone else.

Fatal means leading to or causing death. Deadly is a synonym, but fatal is the standard term for a disease that ends in death.

An alien is a person who is not a citizen of the country in which they live, often considered a stranger. A recluse is someone who lives a solitary life.

A cynic is a person who believes that people are motivated purely by self-interest and is often skeptical or sneering.

A stroll is a leisurely walk, typically taken for pleasure or relaxation.

A parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host.

A messenger is a person who carries a message or is employed to carry messages.

An assassin is a person who murders an important person, often for political or ideological reasons.

A polygon is a plane figure with at least three straight sides and angles. While pentagons and octagons are polygons, 'polygon' is the general term for any figure with more than four sides.

Fastidious describes a person who is very attentive to and concerned about accuracy and detail, often making them hard to please.

Parole is the temporary release of a prisoner who agrees to certain conditions before the completion of a maximum sentence period.

An aquarium is a transparent tank of water in which fish and other water creatures and plants are kept.

 Ochlophobia is the fear of crowds.

An arbitrator is an independent person or body officially appointed to settle a dispute.